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The Singing GlassScience project video

Abstract

Did you know that sound is produced by vibrations? Have you ever hit a drum? When you strike a drum, you will cause the drum skin to vibrate very quickly. This "pushes" the air around the drum, producing sound that reaches our ears. Can you think of other things that produce sound? Today, we are going to make our own music with water and a glass. At first glance this doesn't seem possible. How can we turn a drinking glass into an instrument, you might ask? Well, you will see how this works in the following experiment. You will also learn how to create sound by rubbing your wet fingers along the top of stemware. Experimentation will show differences in the sound produced, with sans without water in the glass.

Objective

Understanding the relationship between vibration and sound.

Scientific Terms

Vibration, Sound, Tone

Background

Did you know that sound is produced by vibrations? Have you ever hit a drum? When you strike a drum, you will cause the drum skin to vibrate very quickly. This "pushes" the air around the drum, producing sound that reaches our ears.

Can you think of other things that produce sound?

Today, we are going to make our own music with water and a glass. At first glance this doesn't seem possible. How can we turn a drinking glass into an instrument, you might ask? Well, you will see how this works in the following experiment.

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    Complexity level:
    1
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    Safety concerns:

    The glassware in this project could be dangerously sharp if broken. Be sure to have an adult supervise the project to ensure safe use of the stemware.